<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			.p1 {
				color: red;
				cursor: pointer;
			}
			
			.p1:hover {
				color: blue;
			}
		</style>
	</head>
	<body>
		<p class="p1">我是p标签，鼠标悬浮上来</p>
	</body>
</html>